Control of motor-operated doors.



YPATENTED OCT. 22, 1907.-

D. W. TAYLOR.

CONTROL OF MOTOR OPERATED DOORS.

AYPLIOATIO] TILED HAY 14,1906.

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m t m% fl O TZr WWW lmd w 09 Db No. 868,723. PATENTED QUT. 22, 1907. D. W. TAYLOR.

GONTROL OP MOTOR OPERATED DOORSw APPLIOATION FILED nu 11,1906.

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\A if ess s Inventor:

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UNITED STATES PATENT OFFICE.

DAVID W. TAYLOR, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGROR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

CONTROL OF MOTOR-OPERATED DOORS.

Io. scenes.

Specifics .tion of Letters Patent.

Patented Oct. 22', 1907.

Application filed Kay 14, 1906- Serisl No. 316.606.

' device which must be controlled both locally and from a distance.

In a control system for bulk-head doors, it is essential that all doors should be simultaneously controllable from a distant point, and that each individual door should be controllable locally independently'of the distant control. The'man at the door should be able to take the control away from the dis-' tant nation, as long as he keeps hishand on the con-,

troller, but as soon ashe releases it, it should be under control of the distant nation troller st oil position snd normally balancingthe first means, and means controllable from s distance for renderingthe second means inoperative so as to allow the controller to be moved to lowering position.

More specifically considered, my invention consists in providing a motor controller with a spring tending to move it to lowering position, a second spring tending to hold it inpfi position andnormally river-powering the first spring, and a tripping magnet adapted to disengage the controller from the second spring so as to allow the first spring to move the controller to lowering position.

With this arrangement the controller is normally held at off position, but a man at the door may move it to either raisingor loweringv position against the tension of one spring or the other, while a'.t the some time by energizing the tripping magnet from the distant station,

' the second spring is disengaged from the controller allowing the first to move the controller to connsct the motor for lowering the door. Thus, all the doors are controllable from a distance so that they may be simultaneously closed, while at the same time a man I at the door can control its movement independently of the distant station, and prevent the door from closing as long as he keeps his hand on the controller.

My invention will best be understood by reference to the accompanying drawings, in which Figure 1 shows a bulk-heed dos-v provided with a corn troller and controlling switch; Fig. 2 shows diagrammatically the circuits of the motor and controlling switch; Fig, 3 shows an end view of the controller with the casing removed, taken in cross-section in the plane indicated by the dotted line 3-3 in Fig. 4; Fig. 4

shows a cross-sectional side view of the controller; and

Fig. 5 shows detail of the connection between the controller and the tripping magnet.

Referring first to Fig. 1, M represents an electric motor carrying on its shaft the worm w engaging the wormwheel W. On the shaft of the worm-wheel is mountedthe pinion P, ,which engages-a rack R carried by the door D vertically movable in the guide G. With this arrangement the door is raised or lowered, according to the direction of rotation of the motor.

' 0 represents the motor controller which is provided with an operating shaft k carrying at each end abandwheel H. The circuit connections are shown diagrammatically in 2. The contacts of the controller 0 are shown,

developed on a plane surface and comprise seven steti'onary fingers c to c, and movable contacts, as shown.

a arepresent line-wires carrying the current for the motor derived fromthe generator or other suitable-- source A. n

B represents the tripping magnet, the circuit of which is controllable from the distant station S.

The motor circuits are as follows: If the movablecontacts of controller 0 are moved downward into engagement with the stationary contact lingers the following circuit may be traced. From line-wire a, contact 0 contact c through the motor field, contact 0, contact 0 resistance?" motor armature contact 0 contact 6- Y r 9 p a p 7 7 line-wire a. The motor circuit is thus closed and the motor is connected for raising the door. The resistance r is included in circuit with the-motor so as to limit the motor current and prevent an excess of current-flow if the door reaches the end of its travel before the current is cut off.

If the movable contacts are moved upwards into the other operative position of the controller, 2i circuit may be traced as follows: from line-wire a, contact 0 contact 0, through the motor field in the opposite direction, contact c, contact of, resistance r, through the motor armature and resistance r in parallel to contacts c :snd 0, respectively, to contact 0 to line-wire a.

The motor is thus connected for lowering the door.

The purpose of the resistance rin shunt to the motor armature is to increase the. field strength of the motor, so as to prevent the motor from racing when lowering the door, and to give it a. strong torque for forcing the door intoclosed position. v I

The circuit of the tripping magnet B is controllable from the distant station S, as is apparent from an inspection of the diagram, and by this means the controller may be released from the second operating spring so as to move it to the proper position for closing the motor circuit for lowering the door.

The construction of the controlling switch and trip ping magnet is shown in Figs. 3, 4 and 5. In these figures, 0 represents the movable contact member which is mountedfast on the operating shaft h, which is provided at both ends with hand-wheels II. spring D surrounding the shaft and abutting at one end on one of the bearings of shaft h, tends to turn the controller C in a clockwise direction as viewed in Fig. 3, so

as to bring the stop 6 carried by the controller into en-' gagement with the stationary stop E; this. being the lowering position of the controller. The controller is, however, normally held in off position, as' shown, by

' means of the lug F carried by the controller which is engaged by a similar lug I carried by the member J. This member J, which is loosely mounted on the shaft h, is provide with a spiral spring 1) which tends to rotate it in th opposite direction to that in which the spring D tends to rotate the controller, and which also acts to hold the lug I normally in engagement with the lug F on the controller. The spring D is stronger than the spring'D, and consequently over-balances it and holds the lug is, carried by the member J, in engagementwith the stop K. i This is clearly shown in Fig.4. The con ,troller is thus prevented from moving to lowering position under-the tension of spring D, and is held in'off po i sition, as shown. The connection between the'con tr'oller C and the member J is clearly shown'in Fig. 5.

Although the controller is thus held in off position it is has been heretofore explained, is controllable from the distant-station. When the magnet B is energized, the

in the appended claims to cover all modifications which are within the scope of my invention.

What I claim ashew and desire to secure by Letters Yatent 9i the United States, is,--

.1. In combination with a motor, a manually operated.

controlling switch therefor having a plurality of operative positions, means tending to move said'switch to .:in openative posi'iion,--means normally holding said switch in, oil position, and means controllable from a distance for dis engaging said switch frbin said holding means.

2'. In combination with a motor, a'manually-operated controlllng switch therefor having aplnrality of operative positions, means tendlng to move said switch to an operv A spiral 1 I i. I ative position, a spring normally holding sa d switch in oil position. and means controllable from a distance for controlling switch therefor, opposing springs arranged to hold said switch yieldingly in olt' position, and means con" trollable from a distance for disengaging said switch from one of said sprii s. I I Y 5. In combination with a motor, a manually-operated controlling switch therefor, opposing springs arranged to hold said switch yieldingly in off position, a tripping inasnet adapted to disengage saidswitch from one of said springs. and means at a distance for controlling the circult of said magnet. 6. vIn combination. a system of doors, a motor for operating each door, a manually-operated controlling switch forcach motor, opposing springs arranged to hold each switch 'yieldingly in off posltlon, a tripping magnet for each switch adapted to disengage it from one of said springsand means at a distant point for simultaneously energizing the tripping magnets of all the switches.

7. In combination, a system of doors, a motor for operating each door, a manuallyoperated controlling switch for each motor,"a spring tending to move each switch to an opera'tlve position, a sec nd spring normally balancing the first and holding the switch normally at off position, an electro-magnet for each switch adapted when'energized to disengage it from its second spring, andmeans at a disrant point for simultaneously cnergizing the several magnets. l

8. In a controlling switch for electric motors, an opci ating shaft, a contact member mounted thereom'a spring tending to move said contact'mernbe'r to an operative position, a member leosely journaled on said shaft and adapted to engage said contact member. a spring act ng-.- upni said second member and lialancing,tlie first spring, and a tripping magnet adapted to disengage said contnct'ineniber from saidsccond member. r

9,. In a controlling; switch for electric motors, an operating shaft, :1 contact member mounted thereon, a spiral spring surrounding the shaft and tending to move said con tact member to an operative position. a second member loosely jocrnaled on the shaft, a second spiral spring acting on said second member to hold it normally'in engage-f ment with said contact member and balancing the first spring, and a tripping magnet adapted t.) disengage said contact member from said second member.

, 10. In a controlling switch for ele tric motors, an operatlngsliait, a contact member mounted thereon, asprlng tending to move said member to an operativeposition, a 'inagne't winding ccncentric with said-Shaik core therefor journaled on said shaft and axially ni o vable thereon.

and a spring arranged to hold said core normally in en-.. igagernent with said contact member and to balance the first spring.

11. 'In combination with a motor, a manually-operated controlling, switch therefor havlng a plurality of operative positions, means tending to move said switch to tln .01l(l'- ative position, means normally holding said switch in off position, and means controllable from a distance for rendering said holding means inoperative. v

In witness whereof, I-have hereunto set my hand this tenth day of Hay, 190G.' i v DAVID W. 'IAXLOIL Witnesses: I

Thomas E. FAST,

I .CrmsfL. Wimn.

llO- 

